/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.iotdb.db.mpp.plan.execution.config.metadata;

import com.google.common.util.concurrent.ListenableFuture;
import com.google.common.util.concurrent.SettableFuture;
import org.apache.iotdb.commons.trigger.TriggerInformation;
import org.apache.iotdb.db.mpp.common.header.ColumnHeader;
import org.apache.iotdb.db.mpp.common.header.ColumnHeaderConstant;
import org.apache.iotdb.db.mpp.common.header.DatasetHeader;
import org.apache.iotdb.db.mpp.common.header.DatasetHeaderFactory;
import org.apache.iotdb.db.mpp.plan.execution.config.ConfigTaskResult;
import org.apache.iotdb.db.mpp.plan.execution.config.IConfigTask;
import org.apache.iotdb.db.mpp.plan.execution.config.executor.IConfigTaskExecutor;
import org.apache.iotdb.rpc.TSStatusCode;
import org.apache.iotdb.trigger.api.enums.TriggerType;
import org.apache.iotdb.tsfile.file.metadata.enums.TSDataType;
import org.apache.iotdb.tsfile.read.common.block.TsBlockBuilder;
import org.apache.iotdb.tsfile.utils.Binary;

import java.nio.ByteBuffer;
import java.util.List;
import java.util.stream.Collectors;

public class ShowTriggersTask implements IConfigTask {

    @Override
    public ListenableFuture<ConfigTaskResult> execute(IConfigTaskExecutor configTaskExecutor)
            throws InterruptedException {
        return configTaskExecutor.showTriggers();
    }

    public static void buildTsBlock(
            List<ByteBuffer> allTriggerInformation, SettableFuture<ConfigTaskResult> future) {
        List<TSDataType> outputDataTypes =
                ColumnHeaderConstant.showTriggersColumnHeaders.stream()
                        .map(ColumnHeader::getColumnType)
                        .collect(Collectors.toList());
        TsBlockBuilder builder = new TsBlockBuilder(outputDataTypes);
        if (allTriggerInformation != null && !allTriggerInformation.isEmpty()) {
            for (ByteBuffer triggerInformationByteBuffer : allTriggerInformation) {
                TriggerInformation triggerInformation =
                        TriggerInformation.deserialize(triggerInformationByteBuffer);
                builder.getTimeColumnBuilder().writeLong(0L);
                builder
                        .getColumnBuilder(0)
                        .writeBinary(Binary.valueOf(triggerInformation.getTriggerName()));
                builder
                        .getColumnBuilder(1)
                        .writeBinary(Binary.valueOf(triggerInformation.getEvent().toString()));
                builder
                        .getColumnBuilder(2)
                        .writeBinary(
                                Binary.valueOf(
                                        triggerInformation.isStateful()
                                                ? TriggerType.STATEFUL.toString()
                                                : TriggerType.STATELESS.toString()));
                builder
                        .getColumnBuilder(3)
                        .writeBinary(Binary.valueOf(triggerInformation.getTriggerState().toString()));
                builder
                        .getColumnBuilder(4)
                        .writeBinary(Binary.valueOf(triggerInformation.getPathPattern().toString()));
                builder.getColumnBuilder(5).writeBinary(Binary.valueOf(triggerInformation.getClassName()));
                builder
                        .getColumnBuilder(6)
                        .writeBinary(
                                Binary.valueOf(
                                        !triggerInformation.isStateful()
                                                ? "ALL"
                                                : String.valueOf(
                                                triggerInformation.getDataNodeLocation().getDataNodeId())));
                builder.declarePosition();
            }
        }
        DatasetHeader datasetHeader = DatasetHeaderFactory.getShowTriggersHeader();
        future.set(new ConfigTaskResult(TSStatusCode.SUCCESS_STATUS, builder.build(), datasetHeader));
    }
}
